Different Membrane Pathways Mediate Ca²⁺ Influx in Adrenal Chromaffin Cells Exposed to 150–400 ns Electric Pulses

Table 1

Effect of blocking VGCCs on 150 ns pulse-induced increases in .

VGCC blocker	Relative fluorescence intensity		Reduction in amplitude (%)	- test ( value)
	Control	VGCC blocked
ω-Agatoxin GVIA (100 nM)			24
ω-Conotoxin (20 nM)			9	NS
Nimodipine (5 μM)			0
Nitrendipine (5 μM)			0
			48
Nimodipine (20 μM)			53
Nitrendipine (20 μM)			62
			67

Nitrendipine at 5 μM; nitrendipine at 20 μM; NS: not significant.